A1 — EVA engine10 firing pipeline: the 13 fixed stages, in order
source: EVA/backend/engine10/firing.py  (def fire_event; sequence at lines 160–181)
Note: this is the documented stage ORDER extracted from live source. A live per-run trace
showing a concrete event_id + ecosystem_id was NOT executed here (booting EVA engine10 can
prime paid enrichment/LLM caches; and no screenshot capability exists in this environment).

  1  existence            (stage_existence)            firing.py:160
  2  regulatory           (stage_regulatory)           firing.py:164
  3  conditions_snapshot  (stage_conditions_snapshot)  firing.py:168
  4  probability          (stage_probability)          firing.py:169
  5  magnitude            (stage_magnitude)            firing.py:173
  6  target_resolution    (stage_target_resolution)    firing.py:174
  7  channel_1            (stage_channel_1)            firing.py:175
  8  channel_2a           (stage_channel_2a)           firing.py:176
  9  channel_2b           (stage_channel_2b)           firing.py:177
 10  regulatory_aug       (stage_regulatory_aug)       firing.py:178
 11  cascade              (stage_cascade)              firing.py:179
 12  baseline_recompute   (stage_baseline_recompute)   firing.py:180
 13  trace_persistence    (stage_trace_persistence)    firing.py:181

Single entrypoint: def fire_event (firing.py:87); Invariant 6 (one pipeline, not two);
Invariant 13 (fire_event does not recurse — cascade is scheduled, not executed inline).